TRIBE ASPIDIOTINI 439 



cc. Pygidium with nine pectinae on each lateris, pectinae long, 

 longer than median lobes, deeply lacinate, arranged 2, 2, 9, 

 those of each lateris unapectinae, not as deeply lacinate as 

 others, forming group cephalad of second lobe; median pair of 

 lobes qaudrangular, distal end bluntly rounded, deep lateral and 

 mesal notches; second pair of lobes longer than broad, deep 

 lateral and faint mesal notches, bluntly pointed; each side of 

 pygidium near cephalic portion of lateres with group of 19-32 

 dorsal oraceratubae. South Africa on Ehretia, Anacardiaceae, 



Illigera, Mitrangune. replicata Lindgr. 



aa. Pygidium with three plates on each lateris, plates arranged 0, 2, 3; 

 median pair of lobes adjacent, large, broad and short, bluntly round- 

 ed, lateral notch; second pair of lobes short, broad, pointed, subobso- 

 lete; two pairs of densariae, well formed, pyriform, lateral margin 

 of each second densaria largest; anus over three times its width 

 from caudal margin and five times from vulva. New Mexico, Cali- 

 fornia on pinus, Libocedrus, Cupressus coniferarum Ckll. 



SPECIES OF CHEMNASPIDIOTUS 



Pygidium with median pair of lobes distinct, broader than long, mesal 

 and lateral notches; densariae in second and third incisurae, wanting 

 in median incisura, subequal; plates arranged 2, 5 to several, those of 

 each lateris arranged, two in each second incisura, three in third in- 

 cisura, and several on each lateris; setae longer than lobes; dorsal ora- 

 ceratubae few; anus twice its width from caudal margin; living in galls 



on leaves. District of Columbia, Georgia, Mississippi on Liquidambar. 



liquidambaris Kotinsky. 



SPECIES OF HENDASPIDIOTUS 



a. Pygidium with densariae of second incisurae normal in length, never 

 greatly elongated. 



b.Pygidium with pectinae or plates in median incisura. 

 c. Pygidium with plates in median incisura. 

 d. Pygidium with densariae in median incisurae; median pair 

 of lobes as long as or longer than broad, rectangular, mesal 

 and lateral margins straight, angles prominent; two plates in 

 median incisura and five pectinae and three short plates on 



each lateris. Mexico. tricolor Ckll. 



dd. Pygidium not with densariae in median incisura. 



e. Pygidium with median pair of lobes broader than long, 

 mesal margins parallel, not converging, quadrangular, dis- 

 tal end bluntly rounded, distinct lateral and faint mesal 

 notches; densariae of second incisurae large, subequal in 

 length, those of third incisurae much smaller, subequal; 

 plates minute, inconspicuous, arranged 2, 2-1; mesal calles 

 strongly thickened, near together, distant from oblique 

 lateral calles; anus large, about twice its own width from 

 caudal margin. South Africa on Robinia.__a/?*icanws Marl, 

 ee. Pygidium with median pair of lobes broader than long, 

 distant, mesal margins converging, rounded, broadest at 



